Automation System
Direct Numerical Control means:

None of these
using several computers to control one large machine
using one computer to control several machines
complete elimination of a need for a human operator.
eliminating computers from the manufacturing process

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Automation System
A venturi tube:

None of these
can be used to measure gas or liquid flow rates
is made only of metal
measures the presence of a liquid
is extremely difficult to use

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Automation System
Trend analysis:

is used only in financial planning
is a brand new concept
requires a very expensive system to implement
None of these
can improve control system response

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